I love this TV. Mostly watching Direct TV, no HDTV yet but the picture quality is quite good on most stations, awesome on many. I am thinking if I don't swap up a little bigger I will be disappointed in the future but if the 57 picture is noticeably less quality than the 51 I will be disappointed immediately. The salesman said that would be the case but I don't know. Has anyone done this and compared the 2 carefully? What do you think? My viewing distance ranges about about 9 to 12 feet but I could go back a few more if necessary.